Air valve



T. C. DE VORE Jung 10 1924.

AIR VALVE Filed July 19 1923 flaw/7,-

Patented June 10, 1924.

STATES THoMs c. DE vonn, or CHICAGO, Immers.'

Application med July 19,

To all whom t may concer/n.

Be it known that-KI, THOMAS C. DE Veen, a citizen of the United States', and a resident of thecity of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Air Valves, of which the following is a specification.

My invention relates to new and useful improvements in air valves, and has for its principal object the provision of an improved construction of this character which will be highly efficient in use, the present invention constitutes an improvement over that disclosed in'my prior application filed inr the United States Patent Ofhce, on or about April 11, 1922, Serial No. 551,488.

f A further contemplation of` the invention is the provision for automatically closing thevalve at afpredetermined degree of heat and for automatically opening the valve when the degree of heat decreases. In this connection,h and to carrythese objects into effect, I provide tubular members carried f by a hanger and an adjustable support,-

formed of such material that is capable o expanding and contracting when subject to heat and such expansion and contracting being determined by the degrees of the heat.

A further object of my invention is the provision. to compensate excess expansion of Athe valve closing means after the valver has been closed.

@ther objects will appear hereinafter. The invention consists inthe combinations and arrangements ofV p'arts hereinafter de,- scribed and claimed.

The invention willloe best understood by reference to the accompanying drawings forming a part of this speciiication, and in which, y F ig. 1 is a verticalsectional detail view ofan air valveembodying the invention,

Fig. 2 is a top plan view of the same, Fig. 3 is a sectional detail view of the same taken substantially on line 3-3 of Fig. 1,

Referring to the drawings showing the preferred form 'of construction,`A represents an air valve embodyin the invention and comprises a cylindrical ody 5 open at its lower end, said opening being closed b a base cap 6 having a lateral projection il which isV adapted to be screw-threaded in the openingof a radiator, (not shownj with which the device' is associated. 'The' upper tend of the cylindrical body 5 is' dome# 1923. serial No. 652,631.

shaped, Vas shown, and carries a valve seat 8 having central passage 9 formed therethrough, the inner wall portions o't saidY opening 9, that isthe portion extending into the cylindrical body 5, being tapered outwardly as indicated at 10. The valve seat 8, is screw-threaded through an opening 10 'formed in the top-most or dome-shaped portionv of the cylindrical body and is provided with a flange 11 adapted to seat on an annular projection or rib 12'` extending around the walls of the opening.

The opening 10 is providedlwith a closure member 13 which in this instance is in the form of a cylindrical cap having a vent 14 projecting laterally and downwardly from the side of the cap in spaced relation with yrespect to the dome-shaped portion of the cylindrical body 5i, as shown.

Arranged in the base cap 6 is a discshaped support 1.5,. carried by an adjustable screw 16pas'sing through a stufling box.17. Thedisc 15 is arranged and adapted to support a tubular'member 18 having kits side walls perforatedand formed of such material that is. capableof expanding and contracting when subject to heat. Thetubular member 18 is strengthened at its upper edge by an annular channel-shaped ring member 19 which carries a hanger 20 JformedV of such material as is capable of expanding and contracting when subject to heat, but which in this instance is formed of such material ythat will withstand a greater degree of heat having a relatively small co-eiicient of exand the core is arranged and "adapted to carry a valve stem 24 which works in the tapered portion of the opening 9 of the valve seat and which is adapted to close said opening when the tubular members 18 and 21 expand. However, if desired, the core 24 can be formed of material similar to the material from which the tblalfn members are formed.- The valve stern 24s pansion,

t hangers.

carries a. dish-shaped annular member 25 which serves the purpose of a baille plate for directing the steam or Water vapor against the perforated tubular members 18 and 21. To prevent the valve stem 24, from becoming wedged in the opening 9, I pro vide an expansion spring 26 Which embraces the valve stem and seats against the valve seat 8 and battle plate 25.

Ir also provided a provision to permit eX- cess expansion of the tubular members 18 and 21,should the members continue to er'- pand due to the heat after the valve is closed. This provisionincludes a disc 27 having a threaded stud 28 adapted to be threaded in a socket 29 formed in the lorver end 30er the core 24. Abutting the disc 27 and the horizontal portion 31 ot the hanger 28 is a spring member 32. This arrangement is such that after the valve has been closed due to the expansion of the tubular members the springmember 82 will permit the continuation or' expansion thereby preventing rupture of the tubular members and Then the tubular members contract to permit opening of the valve the compression or the spring member 32 is released as Will be readily understood. It is intended thatthe tension ot the spring member 32 be somewhat greater than the tension of the spring member 26 so ,that the spring member 32 will not be brought into action, that is compressed, until thevalve is closed.

In use, myy air vent as herein illustrated and described,is mountedfin the usual Way on a radiator orl the like through the medium of the stem 7 and when the steam or Water vapor from the radiator enters the valve, the tubular members 18 and 21 will expand according` to the degree of the heat, andshould the degree be greater than themembers can withstand, the said members, through expansion, will cause the valve stem to close the opening 9 of the valve seat 8, thus preventing vthe exit of the air from the radator. f On the other hand, when the radiator becomes air bound andthe steam or Water vapor cools, the tubular members Will contract, thus opening the passage of the valveseat Spermitting the air to -rfind an exit through the passage 14. By means of the setscrevvfl and discsupport 15, the distance'betwecn the valve steijn2 and the Eouter portion of thefop'ening 9 can be readily i adjusted and by such adjustment for eX- ample should the valve stem be adjusted any great distance :tromthe opening, the

expansion of the'tubular members 18 and 21 will doubtlessly have to be greater in order to close the opening, or should the valve stem be adjusted nearer the opening, the expansion of the tubular members Will doubtlessly be less than When the valve stem is farther away from said opening.

I have found by experience that by torming the vent of the cap 13 in the manner illustrated in Fig. 1, that the singing noise which accompanies the discharge o'f theair from the valve is greatly obviated, it not entirely, and also by this arrangement particles of ydust are revented from Uainin entrance into the cap and settlingaround the valve' seat until the passage of air through the opening ot the valve seat is prevented, this being the case Where the vent ofthe cap is formed in alignment with the opening of the valve seat.

lhile I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification Without departing kfrom the spirit ofthe invention. I, therefore, do not Wish to be limited to the precise details of construction set forth, but desire to avail. myselt1 of such variations and modifications as come Within the scope ot the appended claim. v

Having described my inventionvvhat I claim as new and desire to secure by Letters Patent is: Y

An air valve of the class described including a casing having an air vent Jformed therein, tubular members disposed concentrically With respect to each other arranged Within the casing, a thermostatic member having means at one end controlling passage through the air vent and having a'threadbearing socket Jformed in the other end thereof, a disc member having a threaded stud for threaded engagement with the socket, a spring member having an end in abut- I ment vvith the adjacent side of the disc adapted to compensate for excessive expansion of said members, and means carriedA by one of the tubular members affording a support for the spring member.

In testimony ywhereof I have signed my name to this specification in the presence of tvvo subscribing witnesses.

THOMAS c. DE vous.

Witnesses:

FREDA C. APPLE'roN, JOSHUA R. H. Porre.A 

